Other
Scientific paper
Mar 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aj....105.1002r&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 105, no. 3, p. 1002-1009.
Other
11
Abundance, Astronomical Photometry, Astronomical Spectroscopy, Emission Spectra, Iue, Planetary Nebulae, Gas Ionization, Helium, Infrared Photometry, Infrared Spectroscopy, Near Infrared Radiation, Oxygen, Sulfur, Ultraviolet Photometry, Ultraviolet Spectroscopy
Scientific paper
The young planetary nebula Hubble 12 is observed using near-IR and UV spectrophotometry. The brightness of the O I lines, which is greater than in any other planetary nebula yet measured, indicates that fluorescent excitation by stellar continuum is the principal mechanism generating these lines. Extinction, electron density, and electron temperature are determined using infrared measurements combined with UV data and published optical observations. The range in extinction, density, and temperature implies that, within the ionized region, pockets of emission with distinctly different conditions exist. Logarithmic abundances for helium, oxygen, and sulfur are presented.
Erwin Peter
Feibelman Walter A.
Puetter Richard C.
Rossano George S.
Rudy Richard J.
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